Add ci.yaml

.github/workflows/ci.yaml

@@ -0,0 +1,60 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+jobs:
+  build:
+    name: ${{ matrix.os }} / ghc ${{ matrix.ghc }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+        cabal: [latest]
+        ghc: ["8.6", "8.8", "8.10"]
+        exclude:
+          - os: macOS-latest
+            ghc: "8.8"
+          - os: macOS-latest
+            ghc: "8.6"
+          - os: windows-latest
+            ghc: "8.6"
+          - os: windows-latest
+            ghc: "8.8"
+
+    steps:
+    - uses: actions/checkout@v2
+      if: github.event.action == 'opened' || github.event.action == 'synchronize' || github.event.ref == 'refs/heads/master'
+
+    - uses: actions/setup-haskell@v1.1
+      id: setup-haskell
+      name: Setup Haskell
+      with:
+        ghc-version: ${{ matrix.ghc }}
+        cabal-version: ${{ matrix.cabal }}
+
+    - uses: actions/cache@v1
+      name: Cache ~/.cabal/store
+      with:
+        path: ${{ steps.setup-haskell.outputs.cabal-store }}
+        key: ${{ runner.os }}-${{ matrix.ghc }}-cabal-store
+
+    - uses: actions/cache@v1
+      name: Cache ./dist-newstyle
+      with:
+        path: dist-newstyle
+        key: ${{ runner.os }}-${{ matrix.ghc }}-dist-newstyle
+
+    - name: cabal update
+      run: |
+        cabal update
+
+    - name: cabal build
+      run: |
+        cabal build all --enable-tests
+
+    - name: cabal test
+      run: |
+        cabal test all

README.md

@@ -1,5 +1,7 @@
 # ki
 
+[![GitHub CI](https://github.com/mitchellwrosen/ki/workflows/CI/badge.svg)](https://github.com/mitchellwrosen/ki/actions)
+
 `ki` is a lightweight structured-concurrency library inspired by
 [`libdill`](http://libdill.org/), [`trio`](https://github.com/python-trio/trio),
 and [`golang.org/pkg/context`](https://golang.org/pkg/context/).

ki.cabal

@@ -6,12 +6,23 @@ common component
   default-language: Haskell2010
   ghc-options:
     -Weverything
-    -fno-warn-all-missed-specialisations
+    -Wno-all-missed-specialisations
-    -fno-warn-implicit-prelude
+    -Wno-implicit-prelude
-    -fno-warn-missed-specialisations
+    -Wno-missed-specialisations
-    -fno-warn-missing-import-lists
+    -Wno-missing-import-lists
-    -fno-warn-safe
+    -Wno-safe
-    -fno-warn-unsafe
+    -Wno-unsafe
+  if impl(ghc >= 8.10)
+    ghc-options:
+      -Wno-missing-safe-haskell-mode
+      -Wno-prepositive-qualified-module
+  ghc-options:
+    -Werror
+  -- Putting this after -Werror because of a false positive - I still want to
+  -- see these
+  if impl(ghc >= 8.10)
+    ghc-options:
+      -Wno-unused-packages
 
 library
   import: component
@@ -21,7 +32,12 @@ library
 
 library ki-mtl
   import: component
-  build-depends: base, generic-lens, ki, mtl, unliftio-core
+  build-depends:
+    base,
+    generic-lens,
+    ki,
+    mtl,
+    unliftio-core
   hs-source-dirs: src/ki-mtl
   exposed-modules: Ki.Mtl
   visibility: public

test/Test.hs

@@ -13,7 +13,7 @@ import Control.Exception (Exception (fromException), MaskingState (..), SomeAsyn
 import Control.Monad
 import Data.Foldable
 import Data.Function
-import Data.List
+import Data.List (intercalate)
 import Data.Maybe (isJust)
 import GHC.Clock
 import Ki